Led

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.textinput import TextInput 
from kivy.uix.button import Button 
from kivy.core.window import Window
Window.size=(800,800)
Window.clearcolor=(1,1,1,1)
class bl4(App):
   def build(self):
       bl=BoxLayout(orientation="vertical",spacing=20,padding=25)
       self.t1=TextInput(text="enter 1st number")
       self.t2=TextInput(text="enter 2nd number")
       self.t3=TextInput(text="result here")
       b1=Button(text="LCM",on_press=self.lcm)
       b2=Button(text="HCF",on_press=self.hcf)
       bl.add_widget(self.t1)
       bl.add_widget(self.t2)
       bl.add_widget(self.t3)
       bl.add_widget(b1)
       b1.add_widget(b2)
       return bl
   def lcm(self,obj1):
          a=int(self.t1.text)
          b=int(self.t2.text)
          if(a>b):
             c=a
          else:
             c=b
          while True:
             if(c%a==0 and c%b==0):
                break
             else:
                c=c+1
   def hcf(self,obj2):
            d=int(self.t1.text)
            e=int(self.t2.text)
            h=1 
            for l in range(2,d+1):
               if(d%i==0 and e%i==0):
                 h=i
                 self.t3.text=str(h)
o2=bl4()
o2.run()